westend wrote:
Ron,
Would it be possible for you to set up the CFD program using a full shell on the truck bed and add in a top side wind deflector? Some users report better mileage with the deflector but it would be interesting to see the actual loss of drag. This may be too time intrusive in your schedule, I have no idea how much work it would entail.
Thanks for posting your findings so far. Good luck on the build!
It is definitely possible but would require models of the truck, trailer and wind deflector. It would be influenced greatly by the length of vehicles, size, angle and position of deflector etc. That would be a pretty big task but interesting work.
I see that a few transport trailers are incorporating the skirting and even a back door wind deflectors now. I don't imagine they are doing that for any aesthetic reasons. Maybe fuel mileage does matter :)